Fix variable reference (#50623)

Author: billwert

eng/common/performance/android_scenarios.proj

@@ -20,13 +20,13 @@
   <ItemGroup>
     <HelixWorkItem Include="SOD - Android HelloWorld APK Size">
         <PayloadDirectory>$(WorkItemDirectory)</PayloadDirectory>
-        <PreCommands>cd $(ScenarioDirectory)helloandroid;copy $HELIX_CORRELATION_PAYLOAD%\HelloAndroid.apk .;$(Python) pre.py</PreCommands>
+        <PreCommands>cd $(ScenarioDirectory)helloandroid;copy %HELIX_CORRELATION_PAYLOAD%\HelloAndroid.apk .;$(Python) pre.py</PreCommands>
         <Command>$(Python) test.py sod --scenario-name &quot;%(Identity)&quot;</Command>
         <PostCommands>$(Python) post.py</PostCommands>
     </HelixWorkItem>
     <HelixWorkItem Include="SOD - Android HelloWorld Extracted Size">
         <PayloadDirectory>$(WorkItemDirectory)</PayloadDirectory>
-        <PreCommands>cd $(ScenarioDirectory)helloandroid;copy $HELIX_CORRELATION_PAYLOAD%\HelloAndroid.apk .;$(Python) pre.py --unzip</PreCommands>
+        <PreCommands>cd $(ScenarioDirectory)helloandroid;copy %HELIX_CORRELATION_PAYLOAD%\HelloAndroid.apk .;$(Python) pre.py --unzip</PreCommands>
         <Command>$(Python) test.py sod --scenario-name &quot;%(Identity)&quot;</Command>
         <PostCommands>$(Python) post.py</PostCommands>
     </HelixWorkItem>